Stable silanetriols that contain tert-alkoxy groups: Versatile precursors of siloxane-based nanomaterials

Jumpei Suzuki, Atsushi Shimojima, Yasuhiro Fujimoto, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    24 Citations (Scopus)

    Abstract

    Novel tert-alkoxysilanetriols (ROSi(OH)3, R = adamantyl and 3-ethyl-3-pentyl) have been prepared from the corresponding tert- alkoxytrichlorosilanes and successfully used as molecular building blocks to produce ordered siloxane-based nanomaterials. Controlled hydrolysis of the alkoxytrichlorosilanes led to the formation of crystalline powders of alkoxysilanetriols that were stable under ambient conditions. Solid-state polycondensation of the alkoxysilanetriols occurred upon heating, which led to the formation of ordered silica-organic nanocomposites with laminated morphologies. On the other hand, silylation of the tert-alkoxysilanetriols with chlorotrimethoxysilane enabled us to synthesize well-defined oligomeric alkoxysilanes (ROSi[OSi(OMe)3]3). Hydrolysis and polycondensation of these oligomers followed by acid treatment gave microporous silica with narrow pore size distributions. Thus, tert-alkoxy groups serve not only as protecting groups of siloxane species to regulate hydrolysis and polycondensation, but also as templates to generate micropores thereby providing unique synthetic pathways for the design of ordered silica-based materials.

    Original languageEnglish
    Pages (from-to)973-980
    Number of pages8
    JournalChemistry - A European Journal
    Volume14
    Issue number3
    DOIs
    Publication statusPublished - 2008

    Fingerprint

    Siloxanes
    Polycondensation
    Nanostructured materials
    Silicon Dioxide
    Hydrolysis
    Silica
    Oligomers
    Powders
    Pore size
    Nanocomposites
    Crystalline materials
    Heating
    Acids
    alkoxyl radical

    Keywords

    • Approach
    • Building block
    • Microporous materials
    • Nanostructures
    • Silanes
    • Sol-gel processes

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

    Stable silanetriols that contain tert-alkoxy groups : Versatile precursors of siloxane-based nanomaterials. / Suzuki, Jumpei; Shimojima, Atsushi; Fujimoto, Yasuhiro; Kuroda, Kazuyuki.

    In: Chemistry - A European Journal, Vol. 14, No. 3, 2008, p. 973-980.

    Research output: Contribution to journalArticle

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